average age of 5 boys is 13 years. One more by join them and the average age become 12 year. The age of boys who join last is
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Step-by-step explanation:
Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. At standard conditions hydrogen is a gas of diatomic molecules having the formula H₂. It is colorless, odorless, tasteless, non-toxic, and highly combustible..
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11-year-old boys enrol on the final
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